usb_hcd_link_urb_to_(9)
NAME
usb_hcd_link_urb_to_ep - add an URB to its endpoint queue
SYNOPSIS
int usb_hcd_link_urb_to_ep(struct usb_hcd * hcd, struct urb * urb);
ARGUMENTS
- hcd
- host controller to which urb was submitted
- urb
- URB being submitted
DESCRIPTION
Host controller drivers should call this routine in their enqueue
method. The HCD´s private spinlock must be held and interrupts must be
disabled. The actions carried out here are required for URB submission,
as well as for endpoint shutdown and for usb_kill_urb.
Returns 0 for no error, otherwise a negative error code (in which case
the enqueue method must fail). If no error occurs but enqueue fails
anyway, it must call usb_hcd_unlink_urb_from_ep before releasing the
private spinlock and returning.